Piston



Jan, 6. 1925. 1,522,458

J. M. JACKSON ET AL PISTON Filed Dec. 9, 1922 2 Sheets-Sheet l MJaekswa A 65 may J. M. JACKSON ET AL PISTON Filed D60. 9, 1922 2 Sheets-Sheet 2 Patented Jan. 6, 1925.

UNITED STATES PATENT OFFICE.

JOSEPH M. JACKSON AND CHARLES HUNTLEY, OF ST. JOSEPH, MISSOURI.

PISTON.

Application filed December 9, 1922. Serial No. 605,963.

To all whom it may concern:

Be it known that we, JOSEPH M. JACKSON and CHARLES HUNTLEY, citizens of the United States, residin at St. Joseph, in the county of Buchanan, tate of Missouri, have invented a new and useful Piston, of which the following is a specification.

This invention relates to piston construction, the primary object of the invention being to provide novel means whereby the wrist pin bearing of a piston may be readily and easily adjusted by removing the head of the engine block in which the piston is moving, eliminating the necessity of removing the piston to accomplish the adjustment of the wrist pin bearing. 1

Another object of the invention is to provide means for positioning a wrist pin through the upper portion of a piston, the wrist pin being of a construction to engage the inner surface of a piston to prevent lateral movement of the wrist pin and obviate scoring of a cylinder wall by the wrist 111. p With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings Figure 1 is a side elevational view of a piston constructed in accordance with the invention.

Figure 2 is a vertical sectional view through the piston.

Fig. 3 is a plan view thereof. Figure 4 is a sectional. view taken on line 4- 1 of Figure 1.

Figure 5 is a longitudinal sectional view through the piston taken at right angles to Figure 2.

Figure 6 is a longitudinal sectional view taken at right angles to Figure 5 Figure 7 is a longitudinal sectional view through a further modified form of piston. Figure 8 is a transverse sectional view thereof taken on line 88 of Figure 7.

Referring to the drawings in detail, the reference character 5 designates the body portion of a piston, which has a removable end section 6 formed with a depending circular flange member 7 designed to fit within a circular groove 8 formed in the upper end of the body portion 5.

The body portion 5 is formed with inwardly extended enlargements 9 formed with suitable threaded openings to accommodate the bolts 10 that extend through openings in the end section 6 to secure the end section to the body portion. A suitable lock washer 11 is associated with each bolt 10, to secure the bolts against movement after they have been properly positioned.

Formed integral with the inner wall of the piston are bearing members 12 which bearing members accommodate the ends of the wrist pin 13, the pin having its ends disposed in bearings 14 formed of suitable material to withstand the wear usually directed thereto.

Cooperating with each member 12 is a removable bearing member 15 which is moved into engagement with the member 12 associated therewith, by means of the bolts 16, it being obvious that by removal of these bolts 16, the sections 15 may be dropped to remove the wrist pin and its removable bearing members.

In order that the removable bearing members 1 1 will be held against movement, while in operation, bolts 17 are provided, which bolts are disposed in threaded openings in the upper sections 12, the inner ends of the bolts engaging the removable bearing members 1 1, as clearly shown by Figure 2.

Formed in the wall of the piston, and disposed at an angle with respect to the walls thereof, are the openings 17, which openings provide passageways for lubricating oil to direct oil to the ends of the wrist pins supported within the piston, the inner ends of the openings 13 terminating at points adjacent to the ends of the wrist pin.

In the form of the invention as shown by Figures 6, 7 and 8 of the drawings, the removable bearing members which are indicated at 18 are positioned in the usual wrist pin receiving openings of a piston and held in such. positions by means of the bolts 19 that are shown as frictionally engaging the members 18.

From the foregoing it will be seen that when a wrist pin becomes worn, and the bearing in which the same is supported is also unfit for use, the head of the piston may be removed thereby allowing easy access to the interior of the piston, from a point above the piston to permit of removal and replacement of the members 14 and 18, elimlnating the necessity of removing the piston from the cylinder.

Having thus described the invention, what is claimed as new is A piston having an open upper end, wrist pin bearings forming a part of the piston, and a removable closure for the open end of 10 the piston to permit of adjustment of the wrist pin bearings through the upper end of the piston.

In testimony that we claim the foregoing as our own, we have hereto aflixed our signatures in the presence of two witnesses.

JOSEPH M. JACKSON. CHAS. HUNTLEY. Witnesses:

PAUL MEGOWN, T. H. JAoKsoN. 

